Abstract
Nanosize crystals (quantum dots) of semiconductor embedded in a glass matrix are materials of great interest, due to the controllable optical properties of the semiconductor. Due to the finite size and confinement of the nanocrystals, their linear and nonlinear optical properties change drastically. The distribution of nanocrystal sizes in the material is one of the important parameters, which effects the sharpness of the optical absorption spectrum. We have been exploring phosphate-fluorine based glass matrices, doped with CdSxSex. In this matrix the concentration of semiconductor can be increased by an order of magnitude and the annealing and coalescence temperatures are a few hundred degrees below those for silicate glasses thus making glass processing much simpler. We will describe our measurements of the linear and nonlinear properties of these glasses. In particular the measurement of χ(3) by four wave mixing will be reported. Higher order nonlinear properties, the saturation of the nonlinearity and the onset of irreversible optical changes in the material will be described and interpreted.
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Kaganovskii, Y., Lipovskii, A., Rosenbluh, M. (2000). Recording in Quantum Dot Glasses by Pulsed Laser Irradiation. In: Marom, E., Vainos, N.A., Friesem, A.A., Goodman, J.W., Rosenfeld, E. (eds) Unconventional Optical Elements for Information Storage, Processing and Communications. NATO Science Series, vol 75. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4096-6_29
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DOI: https://doi.org/10.1007/978-94-011-4096-6_29
Publisher Name: Springer, Dordrecht
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